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POActivity terminating abruptly without any exception
 

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    <p>I have an Activity that sometimes terminates abruptly but without any exception being reported or logged. The Activity just ends suddenly and the app returns to the previous Activity in the stack. I'm using ACRA (<a href="http://code.google.com/p/acra/" rel="nofollow noreferrer">http://code.google.com/p/acra/</a>) to capture and report errors, and it works well for all other errors in the app, but in this one case it does not detect any exception having been thrown. Nor is anything reported in Logcat.</p> <p>It always happens at the same "place" in the app, when the user takes a certain action, but it is very intermittent and I've yet to make it happen while attached with the debugger. Are there any other options (besides ACRA and Logcat) for determining what is happening to the Activity? Or is this something in the world of Android Activities that is "known?"</p> <p>If it matters, this Activity is doing Bitmap manipulation and saving; I've had to take steps to avoid potential out of memory errors; but I was getting ACRA reports of OOM exceptions when they did occur, so I don't think this is due to OOME.</p> <p>At the point where it seems to fail, the Activity creates an AsyncTask and executes it. Here's the code for the AsyncTask (ActivityAsyncTask is a really simple super class; EditPhotoEctivity is the one that is dying without an exception, sometime during the creation or execution of this task):</p> <pre><code>import java.io.BufferedOutputStream; import java.io.File; import java.io.IOException; import org.apache.commons.io.FileUtils; import android.graphics.Bitmap; import android.graphics.Bitmap.CompressFormat; import android.media.MediaScannerConnection; import android.media.MediaScannerConnection.MediaScannerConnectionClient; import android.net.Uri; import android.view.View; public class CompositeAndSavePictureTask extends ActivityAsyncTask&lt;File, Void, Uri&gt; implements MediaScannerConnectionClient { public static final String FILE_EXTENSION = ".jpg"; private static final int COMPRESSION_QUALITY = 100; private File file; private Uri mSavedImageUri; private MediaScannerConnection mMediaScannerConnection; public CompositeAndSavePictureTask(EditPhotoActivity owningActivity) { super(owningActivity); mMediaScannerConnection = new MediaScannerConnection(owningActivity, this); } @Override protected EditPhotoActivity getOwner() { return (EditPhotoActivity) super.getOwner(); } @Override protected void onPreExecute() { getOwner().toggleControlsVisibility(false); } @Override protected Uri doInBackground(File... params) { file = params[0]; Bitmap picture = null; View mainContentView = getMainContentView(); try { picture = captureBitmap(mainContentView); saveBitmap(picture); } catch (Exception ex) { LogUtils.logError(this, "Could not save photo", ex); setError(ex); return null; } finally { cleanUpCapture(mainContentView, picture); } try { mMediaScannerConnection.connect(); synchronized (mMediaScannerConnection) { mMediaScannerConnection.wait(); } } catch (InterruptedException ex) { LogUtils.logInfo(this, "MediaScannerConnection was interrupted during scan."); setError(ex); } return mSavedImageUri; } protected Bitmap captureBitmap(View mainContentView) throws Exception { mainContentView.setDrawingCacheEnabled(true); return mainContentView.getDrawingCache(); } protected void cleanUpCapture(View mainContentView, Bitmap capturedBitmap) { mainContentView.setDrawingCacheEnabled(false); if (capturedBitmap != null) { capturedBitmap.recycle(); } } protected void saveBitmap(Bitmap bitmap) throws IOException { BufferedOutputStream outStream = null; try { outStream = new BufferedOutputStream(FileUtils.openOutputStream(file)); bitmap.compress(CompressFormat.JPEG, COMPRESSION_QUALITY, outStream); } finally { try { if (outStream != null) { outStream.close(); } } catch (IOException ex) { LogUtils.logError(this, "Could not close output stream", ex); } } } @Override protected void onPostExecute(Uri savedFileURI) { getOwner().toggleControlsVisibility(true); getOwner().onSaveResult(savedFileURI); } public void onMediaScannerConnected() { mMediaScannerConnection.scanFile(file.getPath(), null /* mimeType */); } public void onScanCompleted(String path, Uri uri) { mMediaScannerConnection.disconnect(); mSavedImageUri = uri; synchronized (mMediaScannerConnection) { mMediaScannerConnection.notify(); } } } </code></pre> <p>See also <a href="https://stackoverflow.com/questions/10988847/view-getdrawingcache-only-works-once">view.getDrawingCache() only works once</a>, which has some relation but is a slightly different scenario.</p> <p>Any and all ideas are welcomed.</p>
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    1. COCould you please provide some source code? Right now it will be like shooting blindfolded.
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    2. COCould you be 'finishing' your Activity somewhere?
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    3. CO@nicholas I've double-checked and triple-checked for any inadvertent calls to finish(). The only ones in the Activity are for successful completion or other expected conditions.
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